LU-8314 utils: revert lfs_getdirstripe to non-recursive mode

LU-8314 utils: revert lfs_getdirstripe to non-recursive mode

Since 2.7 'lfs getdirstripe' enabled recursion mode by default,
while it's not the obvious behavior, this patch reverts it
to non-recursive mode.

Signed-off-by: Lai Siyao <lai.siyao@intel.com>
Change-Id: I683f5dec203230b36ee3da404e7f0817e91d090f
Reviewed-on: http://review.whamcloud.com/21516
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Jian Yu <jian.yu@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>